1FEATURES

· Complies With Universal Serial Bus

Specification Rev. 2.0 (USB 2.0)

· Transmits and Receives Serial Data at Both

Full-Speed (12-Mbit/s) and Low-Speed

(1.5-Mbit/s) Data Rates

· Integrated Bypassable 5-V to 3.3-V Voltage

Regulator for Powering Via USB VBUS

· Low-Power Operation, Ideal for Portable

Equipment

· Meets the IEC-61000-4-2 Contact (±9KV) and

Air-gap (±9KV) ESD Ratings

· Separate I/O Supply With Operation Down to

1.65 V

· Very-Low Power Consumption to Meet USB

Suspend Current Requirements

· No Power-Supply Sequencing Requirements

APPLICATIONS

· Cellular Phones

· Personal Digital Assistants (PDAs)

· Handheld Computers

DESCRIPTION/ORDERING INFORMATION

TUSB2551 is a single-chip transceiver that complies with the physical-layer specifications of universal serial

(USB) 2.0. The device supports both full-speed (12-Mbit/s) and low-speed (1.5-Mbit/s) operation. The

TUSB2551 delivers superior edge rate control, producing crisper eye diagrams, which ease the task of passing

USB compliance testing.

dual supply-voltage operation allows the TUSB2551 to reference the system interface I/O signals to a supply

voltage down to 1.6 V, while independently powered by the USB VCC(5.0). This allows the system interface to

operate at its core voltage without the addition of buffering logic, and also reduce system operating current.